In a study, BYD up-regulates the expression of phosphorylated myosin light chain in rats which promoted myocutaneous movement and improved muscle contractility.[6] In another rats study, BYD could relieve MG symptoms with a decreased level of anti-R97-116 IgG1 and the down-regulation of TNF-α.[7] These may be the mechanism of BYD in treating MG. This evidence concerns the gene TNF and myasthenia gravis.